Who is already convinced of iTeSim. References First customer using iTeSim extensively is Wüstenrot & Württembergische: After implementation of iTeSim by FSC Consultants the customer extended the number of automatically tested interfaces significantly. Today iTeSim is applied in release upgrades, patch tests, rebooking by SimCorp and going-live of configuration packages. In particular, the customer is using iTeSim for all types of interfaces around SCD and mask-tests in Front Office (e.g. FX Forward) and Back Office (e.g. Period-end accrual). Since 2015 W&W is maintaining iTeSim by themselves, supported by a service agreement.